Does a jailbreak void AT&T Next's upgrade?

According to AT&T's Next upgrade policy, my phone must be in "like new" condition in 18 months in order to get a new phone. I was told at AT&T that this meant that my phone couldn't be physically damaged in any way but the representative didn't mention anything about a jailbreak voiding the "like new" status.

Would jailbreaking my phone (iPhone 5s) void said "like new" status?

What is the difference between an Android and an IPhone 5S?

My IPhone 3GS is dead totally broken, no longer able to use it. So my family and I are considering changing phone plans with I the only one getting a new phone. Thinking Android (more info is needed) and an IPhone 5S. Went to the local apple store today, and loved the technology on the IPhone 5S. However, didn't check out the Android. What is your preference and why did you choose it? What is your reference on these phones?

IMovie Mac VS iMovie iPhone?

What iMovie is better for a project? Mac or iPhone?
Also, What are other apps like iMovie on the App Store for Mac?

How to make apple apps on windows?

I already know that you need a mac and a apple license to make and sell apps on the app store, but I'm looking for applications that run on windows without the purchase of a license or mac. I have seen people that use virtual machines to transfer xcode to windows, however, I have experienced too many problems with that already and I would still need a license. I do not want to put my apps on the app store, just put them on my iphone for personal use.

Possible iphone 5s water damage?

Alright so i put my phone (speaker/outlet thing down) into a cupholder today and there was water in the bottom of it and now my phone turns off and won't turn back on any time i hit the sleep/lock button. Does this sound like water damage? If it does, do you know how i can fix it/dry it out? If it doesn't, do you know what might be wrong with it?

Iphone textured screen protector?

Once again I'm asking this question. I have what seems like forever been searching for a textured screen protector for my Iphone 4/4s. My best friend had one and can't remember where she got it or the brand. It had a grainy texture to it and did not show fingerprints.

Please help end this what seems like lifelong quest.

Added (1). Awesome. Jessica is a scam. I get it.

Now that is out of the way someone Please answer my question.
K Thanks.

Will a factory reset of iPhone 4 restore original iOS?

I've got a friend who recently got an iPhone 4 from a sibling who got a new phone. She upgraded it to iOS 7 and it started crashing. It's a hardware issue and we have done everything we can to stop the crashing but the conclusion has been reached that iOS 7 can't work on her phone. Apple Support as helpful as they are told her to buy a new phone.

However,
When she got the phone, the phone store did a total reset of the iPhone and it was restored to iOS 3 or 4. It was one of the really old versions. How can we reset it in such a way? I'm guessing it was a factory reset. Can a factory reset revert the iOS to the very original one the phone came with?

How much is my iPhone worth on eBay?

I have an unlocked iPhone 5s.
64g
Space Grey
Model: A1457
With charger, box, all box content including SIM card remover and manuals etc.

It is used, but in 100% mint condition. Not a single scratch/mark/scuff/greasy fingerprint on either the phone or the box.

How much should I sell it for on eBay? Of course I'd rather sell as 'buy it now' at a set price, but will auction if need be.
How much for 'buy it now', and how much should I set the starting bid price? And roughly how much will they buyers bid to? I can start a very well written ad for the item, with professional wording including serial numbers etc.

Lifeproof case or just buy a waterproof camera?

1. Lifeproof case but risk malfunctioning on my $600 iphone

2. Leave the iphone in my bag when I go near/in beaches/pools and buy a waterproof camera

* For my 2 months trip
** I can only afford one